Enser Communications Team Lead Interview Questions and Answers

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Q1. What is object oriented programming
Ans. 
Object oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.
• OOP focuses on creating objects that interact with each other to solve problems

• Encapsulation, inheritance, and polymorphism are key principles of OOP

• Examples of OOP languages include Java, C++, and Python
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Q2. Questions on data structute
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Q1. About education
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Q2. About previous job experience & salary
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Q1. About roles & responsibilities in previous organization
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Q2. Questions related to job i have applied for
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Q1. Can you provide an overview of your career background?
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Q1. How does spring injects dependencies
Ans. 
Spring injects dependencies through inversion of control and dependency injection.
• Spring uses inversion of control to manage objects and their dependencies.

• Dependencies are injected into a class through constructor injection, setter injection, or field injection.

• Spring container is responsible for creating and managing objects and their dependencies.

• Example: @Autowired annotation is used for dependency injection in Spr
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Q2. How does Hibernate connects to DB
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Hibernate connects to the database using JDBC (Java Database Connectivity) API.
• Hibernate uses JDBC API to establish a connection to the database.

• It uses JDBC drivers to communicate with the database.

• Hibernate configuration file contains database connection details.

• SessionFactory in Hibernate is responsible for creating sessions and managing connections.
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Q1. How to secure your APIs
Ans. 
Securing APIs involves using authentication, authorization, encryption, and monitoring.
• Implement authentication mechanisms such as OAuth, JWT, or API keys

• Use authorization to control access to APIs based on roles and permissions

• Encrypt data transmission using HTTPS/TLS to prevent eavesdropping

• Implement rate limiting and throttling to prevent abuse and DDoS attacks

• Regularly monitor API traffic and logs for suspicious ac
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Q2. How can you configure multiple DBs in your application
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Multiple DBs can be configured in an application by using database connection pooling, configuring multiple data sources, and managing transactions across databases.
• Use database connection pooling to efficiently manage connections to multiple databases

• Configure multiple data sources in the application to connect to different databases

• Implement transaction management to ensure data consistency across multiple databases
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Q1. Family Background and Career History
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Q2. Salary Expectations
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Q1. About batch processing
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Q2. About exception handling
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Q1. About project discussion in details
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Q2. Aws services mainly
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Q1. Handling a team
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Q2. Micro service architecture
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Q1. About personal things
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Q2. About financial thing
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Q1. Basic SQL questions……………………………………..
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Q1. What are your salary expectations?
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Q2. Share details of your previous job.
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Q3. Tell me about yourself.
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Q1. They first ask me about my project then ask more how it was working ,and more deep questions on that to understand how much I know about the project I worked on .
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Q2. Spring Authentitation and Authorization,And Kubernetes
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Q1. Cisco Servers Installation
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Q2. HPe servers installation
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